Furnace



c.-D. FULLER.

. FURNACE.

APPLICATION FILED IUNEZ, 1920.v

Patented oet. 26,1920.

2 SHEETS-SHEET I.

gnou/nto@ @Mfw m M UNITED STATES .PATENT OFFICE.

CHARLES D. ELLEE, or LATROBE. PENNSYLVANIA, AssIGNoE oEEoETY rER CENT. To A. s'. HENRY, or NEW YoEK, N. Y.

' .EURNACE Specification of Letters Patent. Patented Oct'. 26, 1920.

Application filed .Tune 2,1920. Serial No. 385,962.

To all whom t may concern.'

Be it known that I, CHARLES D. FULLER, a citizen of the United States, residing at Latrobe, in the county of Westmoreland and State of Pennsylvania, have invented new and useful Improvements in Furnaces, of which the following is a specification.

The invention relates to improvements in furnaces and analogous structures.

The object of the present invention is to improve the construction of furnaces and analogous constructions having passages for gases either before or after combustion and to provide a simple, practical and eilicient construction adapted to control the speed, direction and actlon of gases in passn ing through such passages whereby the gases may be caused to travel in the desired direction at the proper speed and without a swirling or rotary motion thereby preventing the injury to passage walls resulting from the passage therethrough of uncontrolled gases o f this character. v

With these and other objects in view the invention consists in the novel construction, combination and arrangement of parts hereinafter fully' described, illustrated in. the accompanying drawings and pointed out in the claims hereto appended, it bein understood'that various changes in the orm, proportion and minor `details of construction, Within the scope of the claims, may be resorted to without departing from the' spirit or sacrificing any of the advantages of the invention: y

In the drawing in which like characters of reference designate corresponding parts in -the several'figures:

Figure 1 is a vertical sectional view through a portion of one side of a reversible open-hearth furnace, v

. Fig. 2 is a vertical transverse. sectional view on the line 2-2 of Fig; l.

Fig. 3 is a sectional view on the line 3-3 of Fig. 1.

Fig. 4 is a vertical sectional view of a portion of a furnace showing a passage provided with vertical and horizontal grooves.

Fig.5 is a similar view showing the furnace provided with vertical and inclined or diagonal grooves.

.Fig 6 is a vertical sectional view of a portion of a furnace showing longitudinal oppositely inclined and horizontal or transverse grooves.

Referring to the drawing in 4which the improvements are shown applied to a reversible open-hearth furnace of standard type, 1 designates the veL tical assage which alternately forms the uptak downtake at one side of the open-hearth furnace and the said passage 1 is connected at the top with an inclined passage 2 eX- tending downwardly and transversely of the furnace over the bridge wall 3 for directing the gases or fuel elements into the furnace body 4 for ignition over the bath thereof in the usual manner. The side walls of the vertical passage 1 is provided with vertical grooves 5 and the arched top wall t5 has horizontal grooves 7 inthe concave lnner or lower face thereof. The side and e and.

top walls of the bridge wall passage 2 are provided with grooves 8 and 9 while the bridge wall has grooves 10. The front and rear and top walls of the furnace body are provided with horizontal grooves 11 and 12. The grooves of the side walls of the passage 1 are vertical while the grooves of the bridge wall passage are inclined. The grooves of the top wall 6 and the walls of the furnace body are horizontal. These grooves extend in the directionof the flow or travel of the gases or elements of combustion and they are shown in the form of flutes but they may consist of corrugations or angular channels and they are adapted to prevent the swirling or rotary action of gases'or fuel elements or gaseous roducts of combustion and the injury resulting from the uncontrolled action of hot gases and products of combustion. Also as illustrated in Fig. 4 of the drawing horizontal grooves 13 may be employed. These grooves intersect the vertical grooves 5 and operate to check or retard the flow of the gases and thereby reduce the speed of the same to enable the speed of the gases to be regulated to the extent of preventing a too rapid passage of the gases through the furnace passages. This will facilitate a more uniform mixing of the fuel elements and enablethe appropriate-proportions of the same to be more accurately checking or reduction of the speed of the gases will enable portions of a furnace to be subjected for a greater length of time to the action of the hot gases than would otherwise be possible, thereby utilizing the heat controlled. Also this.

The grooves not only enable the speed and the direction of the gases to be controlled or regulated but they also greatly increase the area of the interior surface of the -passages and enable. the heat to be distributed over a greater area than plain walls of a passage of similar Vdimensions and this increase in the interior surface and the resultant spreading of the heat lessens the heating of the exterior of the furnace walls and the temperature of the walls at the exterior is much less than where the walls arenot provided with the grooves.' This will reduce to a minimum injury to the walls from expansion and cooling stresses and with the removal of the injury diie to the spiral or swirling action of uncontrolled gases passing through passages the durabilityof the walls of the passages 'and analogous furnace structures will be materially increased.

While the improvements are shown applied to an open hearth furnace in the accompanying drawings it will be readily apparent thatthey are applicable to various structures having passages through which gaseous fuel elements or gaseous products of combustion pass and the durability of stacks will be materially increased by eliminating the swirling action of the smoke and other gases and by increasing the interior surface area by means of the said grooves of the channels. l What is claimed is:

`1. A furnace structure or the like, having a wall or assage provided with grooves adapted to increase the interior surface of the passage and arranged to'prevent swirl,- ing or rotary movement of the gases traveling through the passage.

2. A furnace structure or the like, having a wall or passage provided with grooves adapted to increase the interior surface of the passage and arranged to prevent swirling or rotary movement of the gases traveling through the passage, said-- grooves being disposed longitudinally of the passa e.

3. A furnace structure or the like, aving 'Ping through the passage, said grooves ex,-

tending longitudinallyand also diagonally of the' passage.

5. A furnance structure or the like, having a wall or passage provided with grooves adapted to increase the interior surface of the passage and arranged tofpreve-nt swirling or rotary movement of the gases travelingI through the passage, said grooves bei disposed lon itudinally of the passage aii also dia onay in opposite directions.n

6. A rnace structure or the like, having a wall or passage provided with rooves adapted to increase the interior sur ace of f the passage and arranged to prevent swirling or rotary movement of the gases travel-4 ing through the passa e, said grooves ex-V' tending diagonally ofv t site directions.

7. A furnace structure or the like having a wall or passage provided with transverse rooves adapted to increase the interiorsurace of the wall -or passage and arranged to affect the passage of gases for controlling the same. p

8. A furnace structure or the like, having e passage in oppoa wall or passage provided with grooves.

adapted to increase the interior surfacel of the passage and arranged to prevent swirl- `ing or rotary movement of the gases travelsaid grooves eX- p ing through the passage tending longitudinally of the wall or passage and also diagonally of thessame in 61pposite directions and transversely of t e wall or passage at right angles to the longitudinal grooves.

9. A furnace structure or the like having a wall or passage provided with grooves extending in the general direction of the travel of the gases through the furnace and adapted to prevent swirling or rotary movement of the gases.

In testimony whereof I have hereunto set my hand.

CHARLES D. FULLER. 

